<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
</head>
<style type="text/css">
    div {
        width: 960px;
        background-color: rgb(237, 236, 250);
        border: 1px dashed #ccc;
        margin: 10px auto;
    }

    .top {
        height: 200px;
    }

    .banner {
        height: 150px;
    }
    .main{
        height: 500px;
    }
    .footer{
        height: 100px;;
    }
</style>

<body>


<div class="top"></div>
<div class="banner"></div>
<div class="main"></div>
<div class="footer"></div>


</body>
</html>